632 lines
14 KiB
C
632 lines
14 KiB
C
/* $OpenBSD: xform.c,v 1.16 2001/08/28 12:20:43 ben Exp $ */
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/*-
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* The authors of this code are John Ioannidis (ji@tla.org),
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* Angelos D. Keromytis (kermit@csd.uch.gr) and
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* Niels Provos (provos@physnet.uni-hamburg.de).
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*
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* This code was written by John Ioannidis for BSD/OS in Athens, Greece,
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* in November 1995.
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*
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* Ported to OpenBSD and NetBSD, with additional transforms, in December 1996,
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* by Angelos D. Keromytis.
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*
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* Additional transforms and features in 1997 and 1998 by Angelos D. Keromytis
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* and Niels Provos.
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*
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* Additional features in 1999 by Angelos D. Keromytis.
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*
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* Copyright (C) 1995, 1996, 1997, 1998, 1999 by John Ioannidis,
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* Angelos D. Keromytis and Niels Provos.
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*
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* Copyright (C) 2001, Angelos D. Keromytis.
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*
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* Permission to use, copy, and modify this software with or without fee
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* is hereby granted, provided that this entire notice is included in
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* all copies of any software which is or includes a copy or
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* modification of this software.
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* You may use this code under the GNU public license if you so wish. Please
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* contribute changes back to the authors under this freer than GPL license
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* so that we may further the use of strong encryption without limitations to
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* all.
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*
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* THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR
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* IMPLIED WARRANTY. IN PARTICULAR, NONE OF THE AUTHORS MAKES ANY
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* REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE
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* MERCHANTABILITY OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR
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* PURPOSE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/malloc.h>
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#include <sys/sysctl.h>
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#include <sys/errno.h>
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#include <sys/time.h>
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#include <sys/kernel.h>
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#include <machine/cpu.h>
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#include <crypto/blowfish/blowfish.h>
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#include <crypto/des/des.h>
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#include <crypto/sha1.h>
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#include <opencrypto/cast.h>
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#include <opencrypto/deflate.h>
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#include <opencrypto/rijndael.h>
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#include <opencrypto/rmd160.h>
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#include <opencrypto/skipjack.h>
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#include <sys/md5.h>
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#include <opencrypto/cryptodev.h>
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#include <opencrypto/xform.h>
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static void null_encrypt(caddr_t, u_int8_t *);
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static void null_decrypt(caddr_t, u_int8_t *);
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static int null_setkey(u_int8_t **, u_int8_t *, int);
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static void null_zerokey(u_int8_t **);
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static int des1_setkey(u_int8_t **, u_int8_t *, int);
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static int des3_setkey(u_int8_t **, u_int8_t *, int);
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static int blf_setkey(u_int8_t **, u_int8_t *, int);
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static int cast5_setkey(u_int8_t **, u_int8_t *, int);
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static int skipjack_setkey(u_int8_t **, u_int8_t *, int);
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static int rijndael128_setkey(u_int8_t **, u_int8_t *, int);
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static void des1_encrypt(caddr_t, u_int8_t *);
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static void des3_encrypt(caddr_t, u_int8_t *);
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static void blf_encrypt(caddr_t, u_int8_t *);
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static void cast5_encrypt(caddr_t, u_int8_t *);
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static void skipjack_encrypt(caddr_t, u_int8_t *);
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static void rijndael128_encrypt(caddr_t, u_int8_t *);
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static void des1_decrypt(caddr_t, u_int8_t *);
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static void des3_decrypt(caddr_t, u_int8_t *);
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static void blf_decrypt(caddr_t, u_int8_t *);
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static void cast5_decrypt(caddr_t, u_int8_t *);
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static void skipjack_decrypt(caddr_t, u_int8_t *);
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static void rijndael128_decrypt(caddr_t, u_int8_t *);
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static void des1_zerokey(u_int8_t **);
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static void des3_zerokey(u_int8_t **);
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static void blf_zerokey(u_int8_t **);
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static void cast5_zerokey(u_int8_t **);
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static void skipjack_zerokey(u_int8_t **);
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static void rijndael128_zerokey(u_int8_t **);
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static void null_init(void *);
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static int null_update(void *, u_int8_t *, u_int16_t);
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static void null_final(u_int8_t *, void *);
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static int MD5Update_int(void *, u_int8_t *, u_int16_t);
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static void SHA1Init_int(void *);
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static int SHA1Update_int(void *, u_int8_t *, u_int16_t);
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static void SHA1Final_int(u_int8_t *, void *);
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static int RMD160Update_int(void *, u_int8_t *, u_int16_t);
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static int SHA256Update_int(void *, u_int8_t *, u_int16_t);
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static int SHA384Update_int(void *, u_int8_t *, u_int16_t);
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static int SHA512Update_int(void *, u_int8_t *, u_int16_t);
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static u_int32_t deflate_compress(u_int8_t *, u_int32_t, u_int8_t **);
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static u_int32_t deflate_decompress(u_int8_t *, u_int32_t, u_int8_t **);
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MALLOC_DEFINE(M_XDATA, "xform", "xform data buffers");
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/* Encryption instances */
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struct enc_xform enc_xform_null = {
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CRYPTO_NULL_CBC, "NULL",
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/* NB: blocksize of 4 is to generate a properly aligned ESP header */
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4, 0, 256, /* 2048 bits, max key */
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null_encrypt,
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null_decrypt,
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null_setkey,
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null_zerokey,
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};
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struct enc_xform enc_xform_des = {
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CRYPTO_DES_CBC, "DES",
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8, 8, 8,
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des1_encrypt,
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des1_decrypt,
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des1_setkey,
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des1_zerokey,
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};
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struct enc_xform enc_xform_3des = {
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CRYPTO_3DES_CBC, "3DES",
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8, 24, 24,
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des3_encrypt,
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des3_decrypt,
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des3_setkey,
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des3_zerokey
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};
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struct enc_xform enc_xform_blf = {
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CRYPTO_BLF_CBC, "Blowfish",
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8, 5, 56 /* 448 bits, max key */,
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blf_encrypt,
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blf_decrypt,
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blf_setkey,
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blf_zerokey
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};
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struct enc_xform enc_xform_cast5 = {
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CRYPTO_CAST_CBC, "CAST-128",
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8, 5, 16,
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cast5_encrypt,
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cast5_decrypt,
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cast5_setkey,
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cast5_zerokey
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};
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struct enc_xform enc_xform_skipjack = {
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CRYPTO_SKIPJACK_CBC, "Skipjack",
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8, 10, 10,
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skipjack_encrypt,
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skipjack_decrypt,
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skipjack_setkey,
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skipjack_zerokey
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};
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struct enc_xform enc_xform_rijndael128 = {
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CRYPTO_RIJNDAEL128_CBC, "Rijndael-128/AES",
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16, 8, 32,
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rijndael128_encrypt,
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rijndael128_decrypt,
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rijndael128_setkey,
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rijndael128_zerokey,
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};
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struct enc_xform enc_xform_arc4 = {
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CRYPTO_ARC4, "ARC4",
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1, 1, 32,
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NULL,
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NULL,
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NULL,
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NULL,
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};
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/* Authentication instances */
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struct auth_hash auth_hash_null = {
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CRYPTO_NULL_HMAC, "NULL-HMAC",
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0, 0, 12, sizeof(int), /* NB: context isn't used */
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null_init, null_update, null_final
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};
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struct auth_hash auth_hash_hmac_md5_96 = {
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CRYPTO_MD5_HMAC, "HMAC-MD5",
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16, 16, 12, sizeof(MD5_CTX),
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(void (*) (void *)) MD5Init, MD5Update_int,
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(void (*) (u_int8_t *, void *)) MD5Final
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};
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struct auth_hash auth_hash_hmac_sha1_96 = {
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CRYPTO_SHA1_HMAC, "HMAC-SHA1",
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20, 20, 12, sizeof(SHA1_CTX),
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SHA1Init_int, SHA1Update_int, SHA1Final_int
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};
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struct auth_hash auth_hash_hmac_ripemd_160_96 = {
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CRYPTO_RIPEMD160_HMAC, "HMAC-RIPEMD-160",
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20, 20, 12, sizeof(RMD160_CTX),
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(void (*)(void *)) RMD160Init, RMD160Update_int,
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(void (*)(u_int8_t *, void *)) RMD160Final
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};
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struct auth_hash auth_hash_key_md5 = {
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CRYPTO_MD5_KPDK, "Keyed MD5",
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0, 16, 12, sizeof(MD5_CTX),
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(void (*)(void *)) MD5Init, MD5Update_int,
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(void (*)(u_int8_t *, void *)) MD5Final
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};
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struct auth_hash auth_hash_key_sha1 = {
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CRYPTO_SHA1_KPDK, "Keyed SHA1",
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0, 20, 12, sizeof(SHA1_CTX),
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SHA1Init_int, SHA1Update_int, SHA1Final_int
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};
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struct auth_hash auth_hash_hmac_sha2_256 = {
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CRYPTO_SHA2_HMAC, "HMAC-SHA2",
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32, 32, 12, sizeof(SHA256_CTX),
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(void (*)(void *)) SHA256_Init, SHA256Update_int,
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(void (*)(u_int8_t *, void *)) SHA256_Final
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};
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struct auth_hash auth_hash_hmac_sha2_384 = {
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CRYPTO_SHA2_HMAC, "HMAC-SHA2-384",
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48, 48, 12, sizeof(SHA384_CTX),
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(void (*)(void *)) SHA384_Init, SHA384Update_int,
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(void (*)(u_int8_t *, void *)) SHA384_Final
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};
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struct auth_hash auth_hash_hmac_sha2_512 = {
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CRYPTO_SHA2_HMAC, "HMAC-SHA2-512",
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64, 64, 12, sizeof(SHA512_CTX),
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(void (*)(void *)) SHA512_Init, SHA512Update_int,
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(void (*)(u_int8_t *, void *)) SHA512_Final
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};
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/* Compression instance */
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struct comp_algo comp_algo_deflate = {
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CRYPTO_DEFLATE_COMP, "Deflate",
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90, deflate_compress,
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deflate_decompress
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};
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/*
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* Encryption wrapper routines.
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*/
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static void
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null_encrypt(caddr_t key, u_int8_t *blk)
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{
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}
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static void
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null_decrypt(caddr_t key, u_int8_t *blk)
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{
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}
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static int
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null_setkey(u_int8_t **sched, u_int8_t *key, int len)
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{
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*sched = NULL;
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return 0;
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}
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static void
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null_zerokey(u_int8_t **sched)
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{
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*sched = NULL;
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}
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static void
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des1_encrypt(caddr_t key, u_int8_t *blk)
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{
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des_cblock *cb = (des_cblock *) blk;
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des_key_schedule *p = (des_key_schedule *) key;
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des_ecb_encrypt(cb, cb, p[0], DES_ENCRYPT);
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}
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static void
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des1_decrypt(caddr_t key, u_int8_t *blk)
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{
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des_cblock *cb = (des_cblock *) blk;
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des_key_schedule *p = (des_key_schedule *) key;
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des_ecb_encrypt(cb, cb, p[0], DES_DECRYPT);
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}
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static int
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des1_setkey(u_int8_t **sched, u_int8_t *key, int len)
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{
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des_key_schedule *p;
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int err;
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MALLOC(p, des_key_schedule *, sizeof (des_key_schedule),
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M_CRYPTO_DATA, M_NOWAIT|M_ZERO);
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if (p != NULL) {
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des_set_key((des_cblock *) key, p[0]);
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err = 0;
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} else
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err = ENOMEM;
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*sched = (u_int8_t *) p;
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return err;
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}
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static void
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des1_zerokey(u_int8_t **sched)
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{
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bzero(*sched, sizeof (des_key_schedule));
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FREE(*sched, M_CRYPTO_DATA);
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*sched = NULL;
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}
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static void
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des3_encrypt(caddr_t key, u_int8_t *blk)
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{
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des_cblock *cb = (des_cblock *) blk;
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des_key_schedule *p = (des_key_schedule *) key;
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des_ecb3_encrypt(cb, cb, p[0], p[1], p[2], DES_ENCRYPT);
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}
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static void
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des3_decrypt(caddr_t key, u_int8_t *blk)
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{
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des_cblock *cb = (des_cblock *) blk;
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des_key_schedule *p = (des_key_schedule *) key;
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des_ecb3_encrypt(cb, cb, p[0], p[1], p[2], DES_DECRYPT);
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}
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static int
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des3_setkey(u_int8_t **sched, u_int8_t *key, int len)
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{
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des_key_schedule *p;
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int err;
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MALLOC(p, des_key_schedule *, 3*sizeof (des_key_schedule),
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M_CRYPTO_DATA, M_NOWAIT|M_ZERO);
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if (p != NULL) {
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des_set_key((des_cblock *)(key + 0), p[0]);
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des_set_key((des_cblock *)(key + 8), p[1]);
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des_set_key((des_cblock *)(key + 16), p[2]);
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err = 0;
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} else
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err = ENOMEM;
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*sched = (u_int8_t *) p;
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return err;
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}
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static void
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des3_zerokey(u_int8_t **sched)
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{
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bzero(*sched, 3*sizeof (des_key_schedule));
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FREE(*sched, M_CRYPTO_DATA);
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*sched = NULL;
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}
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static void
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blf_encrypt(caddr_t key, u_int8_t *blk)
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{
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BF_LONG t[2];
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memcpy(t, blk, sizeof (t));
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t[0] = ntohl(t[0]);
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t[1] = ntohl(t[1]);
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/* NB: BF_encrypt expects the block in host order! */
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BF_encrypt(t, (BF_KEY *) key);
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t[0] = htonl(t[0]);
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t[1] = htonl(t[1]);
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memcpy(blk, t, sizeof (t));
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}
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static void
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blf_decrypt(caddr_t key, u_int8_t *blk)
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{
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BF_LONG t[2];
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memcpy(t, blk, sizeof (t));
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t[0] = ntohl(t[0]);
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t[1] = ntohl(t[1]);
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/* NB: BF_decrypt expects the block in host order! */
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BF_decrypt(t, (BF_KEY *) key);
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t[0] = htonl(t[0]);
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t[1] = htonl(t[1]);
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memcpy(blk, t, sizeof (t));
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}
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static int
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blf_setkey(u_int8_t **sched, u_int8_t *key, int len)
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{
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int err;
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MALLOC(*sched, u_int8_t *, sizeof(BF_KEY),
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M_CRYPTO_DATA, M_NOWAIT|M_ZERO);
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if (*sched != NULL) {
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BF_set_key((BF_KEY *) *sched, len, key);
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err = 0;
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} else
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err = ENOMEM;
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return err;
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}
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static void
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blf_zerokey(u_int8_t **sched)
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{
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bzero(*sched, sizeof(BF_KEY));
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FREE(*sched, M_CRYPTO_DATA);
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*sched = NULL;
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}
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static void
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cast5_encrypt(caddr_t key, u_int8_t *blk)
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{
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cast_encrypt((cast_key *) key, blk, blk);
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}
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static void
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cast5_decrypt(caddr_t key, u_int8_t *blk)
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{
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cast_decrypt((cast_key *) key, blk, blk);
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}
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static int
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cast5_setkey(u_int8_t **sched, u_int8_t *key, int len)
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{
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int err;
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MALLOC(*sched, u_int8_t *, sizeof(cast_key), M_CRYPTO_DATA, M_NOWAIT|M_ZERO);
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if (*sched != NULL) {
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cast_setkey((cast_key *)*sched, key, len);
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err = 0;
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} else
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err = ENOMEM;
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return err;
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}
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static void
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cast5_zerokey(u_int8_t **sched)
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{
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bzero(*sched, sizeof(cast_key));
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FREE(*sched, M_CRYPTO_DATA);
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*sched = NULL;
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}
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static void
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skipjack_encrypt(caddr_t key, u_int8_t *blk)
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{
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skipjack_forwards(blk, blk, (u_int8_t **) key);
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}
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static void
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skipjack_decrypt(caddr_t key, u_int8_t *blk)
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{
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skipjack_backwards(blk, blk, (u_int8_t **) key);
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}
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static int
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skipjack_setkey(u_int8_t **sched, u_int8_t *key, int len)
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{
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int err;
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/* NB: allocate all the memory that's needed at once */
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MALLOC(*sched, u_int8_t *, 10 * (sizeof(u_int8_t *) + 0x100),
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M_CRYPTO_DATA, M_NOWAIT|M_ZERO);
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if (*sched != NULL) {
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u_int8_t** key_tables = (u_int8_t**) *sched;
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u_int8_t* table = (u_int8_t*) &key_tables[10];
|
|
int k;
|
|
|
|
for (k = 0; k < 10; k++) {
|
|
key_tables[k] = table;
|
|
table += 0x100;
|
|
}
|
|
subkey_table_gen(key, (u_int8_t **) *sched);
|
|
err = 0;
|
|
} else
|
|
err = ENOMEM;
|
|
return err;
|
|
}
|
|
|
|
static void
|
|
skipjack_zerokey(u_int8_t **sched)
|
|
{
|
|
bzero(*sched, 10 * (sizeof(u_int8_t *) + 0x100));
|
|
FREE(*sched, M_CRYPTO_DATA);
|
|
*sched = NULL;
|
|
}
|
|
|
|
static void
|
|
rijndael128_encrypt(caddr_t key, u_int8_t *blk)
|
|
{
|
|
rijndael_encrypt((rijndael_ctx *) key, (u_char *) blk, (u_char *) blk);
|
|
}
|
|
|
|
static void
|
|
rijndael128_decrypt(caddr_t key, u_int8_t *blk)
|
|
{
|
|
rijndael_decrypt(((rijndael_ctx *) key) + 1, (u_char *) blk,
|
|
(u_char *) blk);
|
|
}
|
|
|
|
static int
|
|
rijndael128_setkey(u_int8_t **sched, u_int8_t *key, int len)
|
|
{
|
|
int err;
|
|
|
|
MALLOC(*sched, u_int8_t *, 2 * sizeof(rijndael_ctx), M_CRYPTO_DATA,
|
|
M_NOWAIT|M_ZERO);
|
|
if (*sched != NULL) {
|
|
rijndael_set_key((rijndael_ctx *) *sched, (u_char *) key, len * 8, 1);
|
|
rijndael_set_key(((rijndael_ctx *) *sched) + 1, (u_char *) key,
|
|
len * 8, 0);
|
|
err = 0;
|
|
} else
|
|
err = ENOMEM;
|
|
return err;
|
|
}
|
|
|
|
static void
|
|
rijndael128_zerokey(u_int8_t **sched)
|
|
{
|
|
bzero(*sched, 2 * sizeof(rijndael_ctx));
|
|
FREE(*sched, M_CRYPTO_DATA);
|
|
*sched = NULL;
|
|
}
|
|
|
|
/*
|
|
* And now for auth.
|
|
*/
|
|
|
|
static void
|
|
null_init(void *ctx)
|
|
{
|
|
}
|
|
|
|
static int
|
|
null_update(void *ctx, u_int8_t *buf, u_int16_t len)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
null_final(u_int8_t *buf, void *ctx)
|
|
{
|
|
if (buf != (u_int8_t *) 0)
|
|
bzero(buf, 12);
|
|
}
|
|
|
|
static int
|
|
RMD160Update_int(void *ctx, u_int8_t *buf, u_int16_t len)
|
|
{
|
|
RMD160Update(ctx, buf, len);
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
MD5Update_int(void *ctx, u_int8_t *buf, u_int16_t len)
|
|
{
|
|
MD5Update(ctx, buf, len);
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
SHA1Init_int(void *ctx)
|
|
{
|
|
SHA1Init(ctx);
|
|
}
|
|
|
|
static int
|
|
SHA1Update_int(void *ctx, u_int8_t *buf, u_int16_t len)
|
|
{
|
|
SHA1Update(ctx, buf, len);
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
SHA1Final_int(u_int8_t *blk, void *ctx)
|
|
{
|
|
SHA1Final(blk, ctx);
|
|
}
|
|
|
|
static int
|
|
SHA256Update_int(void *ctx, u_int8_t *buf, u_int16_t len)
|
|
{
|
|
SHA256_Update(ctx, buf, len);
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
SHA384Update_int(void *ctx, u_int8_t *buf, u_int16_t len)
|
|
{
|
|
SHA384_Update(ctx, buf, len);
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
SHA512Update_int(void *ctx, u_int8_t *buf, u_int16_t len)
|
|
{
|
|
SHA512_Update(ctx, buf, len);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* And compression
|
|
*/
|
|
|
|
static u_int32_t
|
|
deflate_compress(data, size, out)
|
|
u_int8_t *data;
|
|
u_int32_t size;
|
|
u_int8_t **out;
|
|
{
|
|
return deflate_global(data, size, 0, out);
|
|
}
|
|
|
|
static u_int32_t
|
|
deflate_decompress(data, size, out)
|
|
u_int8_t *data;
|
|
u_int32_t size;
|
|
u_int8_t **out;
|
|
{
|
|
return deflate_global(data, size, 1, out);
|
|
}
|